00:01
In this problem, we're going to talk about uniform motion.
00:03
So remember that in uniform motion, the velocity v is equal to the variation in speed in position, delta x, divided by the variation in time.
00:17
So delta x is the variation in position, delta t in time.
00:22
So what we have in our problem is a guy named breacher who travels a distance of 125 miles.
00:33
Usually, at a speed, i'm going to call it v0 of 65 miles per hour.
00:39
This is the maximum speed where he's traveling.
00:45
But today he is especially late, so he travels at 70 miles per hour above the speed limit.
00:55
And we want to know how many minutes he saves.
00:59
So let's calculate how much time it takes for his trip.
01:03
And when he travels at 65 miles per hour and when he travels at 70 miles per hour.
01:11
So the time it takes when he travels at 65 miles per hour is delta x divided by v.
01:19
So this is 125 miles divided by 65 miles per hour...